United AirlinesUA
Flights UA4581 06:15 We Th · UA6258 06:15 Mo Tu Fr · UA4585 08:35 Mo Tu We Fr Su · UA4595 08:35 Tu Fr Sa Su
live
Direct flights from St Louis (STL) to Houston (IAH): 7 nonstop departures observed each week across 1 airline. The median arrival is 4 minutes late. No cancellations were recorded across the 3 tracked flights. The nonstop covers 1,076 km, an estimated 1 hour 53 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Houston. Updated 13 September 2026 at 22:24 UTC.
STL
St Louis
busy · +21
IAH
Houston
smooth · +0
1,076 km · ~1h 53m est.
Running clean · 1 airline · 7x weekly · nonstop
86 / 100
route health from live STL and IAH delay boards
Median arrival delay is +4 min. 0 of 3 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+4 minacross the last 3 operated legs
Flight time~1h 53mestimated from route distance
Weekly departures7x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at STL: 38% odds of a 15+ minute delay, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the St Louis to Houston route actually runs
Pro Flight Search records official board updates for nonstop STL to IAH flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — St Louis (STL) to Houston (IAH) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STL-IAH
STL to IAH questions
Is STL–IAH running on time right now?
Smooth skies ahead. The departure side at STL is the weaker end, route health score 86/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on STL–IAH?
Operators schedule morning departures around 06:15 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the IAH delay card to confirm conditions when you'd arrive.
How long is the flight from STL to IAH?
Great-circle distance is 1,076 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 106–122 min gate-to-gate on this route.
How often does STL–IAH fly?
United Airlines runs the route with about 36 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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